Animal tag

ABSTRACT

A tag ( 1 ) for attachment to an animal skin comprising, a body portion ( 2 ), a skin penetrating head ( 4 ) attached to the body portion, and a locking member ( 6 ) attached to the body portion at a different location to the skin penetrating head, the locking member being engageable with the skin penetrating head to secure the two from being pulled apart, wherein the construction is such that the body portion is adapted to be bent and held in a configuration of at least two loops when the skin penetrating head is initially inserted through the skin of an animal and engaged with the locking member.

FIELD OF THE INVENTION

[0001] The present invention relates, in general terms, to improvements in or relating to animal tagging, and to methods and apparatus for use therein and therewith. More particularly, but not exclusively, the invention relates to an improved tag, label or the like means (hereinafter referred to as “a tag”) for use with animals for a range of purposes which may include allowing for ready identification and/or tracking thereof (for whatever reason).

BACKGROUND OF THE INVENTION

[0002] In accordance with the known art, the tagging of animals for purposes of ready identification, tracking or monitoring of movements, etc has involved the use of a tag or the like means of a unitary kind having first and second portions held together, at or adjacent an extremity of each portion, by an expanding region in such a way that a distal extremity of a first portion can be passed through an aperture made in the ear of the animal, for example, with the overall tag then being arranged such that the expanding portion rests positioned through the ear and the respective first and second portions extend, at least to some extent, over the ear of the animal. Such a form of tag has enjoyed universal usage and is applied by taking an appropriate applicator or tool to make a hole in the ear of the animal (be it a sheep, cow, horse or in fact any type of animal, domestic or otherwise) just in from an edge thereof, then prising the respective first and second portions of the aforementioned tag apart so as to enable one of those portions to be inserted through the hole thus created, the two portions then being manipulated into such a condition that the expanding portion rests through the hole formed in the ear of the animal, thereby to allow the respective first and second portions to assume a substantially parallel configuration. It has been found, however, that such tags, despite their long-standing market acceptance, have nonetheless exhibited certain drawbacks or disadvantages. To be more specific, and by way of example only, there exists a significant possibility of such a tag or identification means being deliberately or inadvertently displaced or removed, as for example by the animal rubbing its ear—or for that matter the relevant part of its anatomy where any such tag is located—against any given surface, catching the ear on any form of obstacle, etc. As well, readability of an ear tag can often present difficulties.

[0003] It is an object of the invention to provide a tag which obviates or ameliorates one or more of the aforesaid difficulties.

DISCLOSURE OF THE INVENTION

[0004] The invention provides a tag for attachment to an animal skin comprising,

[0005] a body portion,

[0006] a skin penetrating head attached to the body portion, and

[0007] a locking member attached to the body portion at a different location to the skin penetrating head, the locking member being engageable with the skin penetrating head to secure the two from being pulled apart,

[0008] wherein the construction is such that the body portion is adapted to be bent and held in a configuration of at least two loops when the skin penetrating head is initially inserted through the skin of an animal and engaged with the locking member.

[0009] The body portion may include at least one opening through which the skin penetrating head and a section of the body portion may be threaded to bring the penetrating head into engagement with the locking member, the opening serving to hold the tag in the at least two loop configuration.

[0010] Suitably, the locking member and body portion are moulded as an integral unit from resilient plastics material. The plastics materials may act to maintain the two loops under tension. Thus, a section of the body portion extending between the opening and penetrating head may expand in the sense that it may pull through the opening to increase in length. By enabling this section of body portion to extend, the tag may be able to accommodate growth of an animal.

[0011] In a particular alternative embodiment, the tag may be formable into a configuration of three loops. In such a configuration, the body portion may comprise a receiving member having two locking members spaced apart by an intermediate section,

[0012] a flexible strap member having two skin piercing heads spaced apart by a central section of the strap member, and

[0013] at least one opening provided in the intermediate section, the at least one opening being constructed so as to allow each skin penetrating head to be threaded through the at least one opening to be engaged by a respective one of the two locking members.

[0014] The construction of the three looped tag is preferably one which accommodates growth of an animal in a similar manner to that described with reference to the two loop tag above. In order to achieve this, the at least one opening through which the skin penetrating heads may be threaded should allow for expansion of the two regions of the tag where the penetrating heads are attached to the locking members. Thus, the at least one opening should be in the form of an elongate slot through which both penetrating heads may be threaded. More preferably however, it is preferred that there be two separate openings both in the form of slots.

[0015] In another aspect the invention provides a skin penetrating head comprising a central supporting portion of moulded plastics material having at least two thin flanges extending beyond the central supporting portion, the at least two thin flanges having sharp edges and meeting at a sharp point forward of the supporting point, the sharp edges of the at least two flanges each extending for a distance of at least 1 mm and having a width of at least 1 mm and a maximum thickness of 1 mm past the edge of the central supporting portion, the maximum width of the skin penetrating head being no greater than 8 mm.

[0016] The flanges may comprise a single piece of metal in the form of an arrowhead extending through and from both sides of the central supporting portion, the central portion of the metal arrowhead extending into an open ended recess formed in the central supporting portion whereby to permit access to the central portion of the metal arrowhead by an implant pin for pushing the penetrating head through animal skin.

[0017] In another aspect, the invention provides a method of applying a tag according to the invention to the skin of an animal which comprises,

[0018] setting the configuration of the tag so that the skin penetrating head and the locking member are on opposite sides of the skin being tagged which skin is folded to form at least two superimposed layers,

[0019] pressing the skin penetrating head through the superimposed layers and into engagement with the locking member to form a closed tag in a configuration of at least two loops.

[0020] Suitably the skin of the animal is folded to form four superimposed layers. The skin of the ear may be folded in this manner.

[0021] One or more flags may be attached to the tag of the invention. It may be attached as an integral part of the tag or by any other suitable means such as by a swivel. Other items may also be attached to the tag. These may include any form of data concerning the animal, a transponder, any form of diagnostic device, any form of treatment device or chemical or electronic device, any form of signalling device and any form of locating device.

[0022] In order that the invention may be more clearly understood and put into practical effect reference will now be made to preferred embodiments of a tag in accordance with the present invention, as well as to methods and apparatus for use in the application thereof. The ensuring description is given by way of non-limitative example only and is with reference to the accompanying drawings:

BRIEF DESCRIPTION OF THE DRAWINGS

[0023]FIG. 1 is a front elevational view of a tag in accordance with the present invention, in its expanded condition prior to use thereof, the drawing further illustrating a possible form of an implanting pin for use in the actual disposition of the tag on an animal;

[0024]FIG. 1a is the cross-section X-X through FIG. 1;

[0025]FIG. 2 is a side view of a tag in accordance with the invention, in the configuration prior to disposition on an animal, showing the mode of co-operation required between the implanting pin and the tag itself;

[0026]FIG. 3 is a side view of a tag in accordance with the present invention, as disposed through a skin fold of an animal;

[0027]FIG. 3a is a vertical section taken through the locking member 6 shown in FIG. 3;

[0028]FIG. 3b is a vertical section taken through the opening construction 7 shown in FIG. 3;

[0029]FIG. 3c is a sketch of a conventional tag applied to the ear of an animal rubbing its ear against the wire of a fence;

[0030]FIG. 3d is a sketch of a tag according to the invention applied to the ear of an animal rubbing its ear against the wire of a fence;

[0031]FIG. 4 is a sectional view of an apparatus in accordance with the present invention for use in the disposition of a tag on an animal, showing a skin fold in position prior to the formation of a hole therethrough;

[0032]FIGS. 5 and 6 are views, similar to FIG. 4, showing succeeding stages in the method of disposition of a tag, in accordance with the present invention, on an animal, with FIG. 5 showing the apparatus as primed for discharge, and FIG. 6 showing that same apparatus after discharge;

[0033]FIGS. 7 and 8 are sectional views taken along the lines 7-7 and 8-8 in FIG. 5;

[0034]FIG. 9 is a side view of a further possible embodiment of an apparatus (applicator tool or gun) for application or installation of a tag in accordance with the invention, having such a tag in place thereon;

[0035]FIG. 10 is a further view of a tag in accordance with the present invention, as it appears in use, with a further or ancillary identification means, label or the like associated therewith;

[0036]FIG. 11a and 11 b are views of alternative embodiments for a tag in accordance with the present invention;

[0037]FIG. 11c shows an alternative method of attaching a flag to the tag of FIG. 11a and 11 b;

[0038]FIGS. 11d and 11 e illustrate fitted tags;

[0039]FIGS. 12a to 12 d illustrate different views of a stem member and implant pin;

[0040]FIGS. 12e to 12 g illustrate the application of the tag of FIGS. 12a to 12 d to skin;

[0041]FIGS. 13a to 13 c illustrate a two component tag and its applications to the skin of an animal;

[0042]FIGS. 14a to 14 e and 15 a to 15 e show the approach for assembling a two component tag along the lines of that described with reference to FIGS. 13a to 13 c; and

[0043] FIGS. 17 to 21 show various elevation views of an applicator in full and in section.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0044] An improved tag in accordance with the present invention, when applied to an animal such as a cow, is preferably located in ear or in the tail-fold area. In reality, however, such a tag may be located at any position on the animal where the thickness of the skin allows for a fold to be formed or created in the skin, as by pinching, as for example folding the ear, or pinching the skin above an udder or in the lateral tail fold, etc. When attached to the tail fold, for example such a tag is not only readily readable, but also easily cleaned as and when necessary.

[0045] An improved tag in accordance with the present invention, as shown in FIG. 1 of the drawings, is of a unitary construction and may be formed from any suitable material, as for example a plastics material of any given type. It should be realised, however, that the actual material of construction is not of the essence of the invention. The overall tag, generally designated 1, includes a body portion generally designated 2, being substantially elongate in shape, having extending from one end thereof a neck member 3, which is preferably of a reduced lateral dimension when compared with the remainder of the body portion 2, terminating in a stem member 4. The stem member 4 shown is preferably in the form a shaped extension, protruding substantially normally to the lateral surface of the neck member 3, and having a blind bore 5 formed therein. It is shaped in the form of a head which is readily adapted to penetrate the skin of an animal to which the tag is to be applied. At or in the vicinity of the area of transition between the wider part of the body member 2 and the neck member 3 there may be provided at least one elongate slot, hole or aperture (not shown) extending through the body member 2 itself, such as to facilitate bending to in turn facilitate installation. In an alternative embodiment, again not shown, in that transition area there may be provided or included at least one line of weakening; thereby facilitating bending thereof and ultimate installation. At or in the vicinity of the other, free end of the body portion 2 there is provided a locking member 6 adapted, in use to co-operate with the neck member 3 and associated stem member 4, whereby to allow for locking of the overall tag 1 in place relative to an animal. The main body portion 2 also includes an opening aperture, slot or weakened area 7. The opening 7 may be shaped so that it can be used to grip the stem member or penetrating head 4 to hold it in place in a “cocked ” configuration prior to attachment of the tag. During attachment of the tag the stem member 4 is subsequently pushed through the opening 7 as will be described in more detail hereinafter with reference to the other drawings. The opening is also adapted, in use, to allow the narrow end of the extension 5 of the stem member 4 and associated neck member 3 to be threaded or passed therethrough during application of the tag. The free end of the stem member 4 forming the head, in the embodiment shown, is adapted in use to be received and releasably retained by the locking member 6 provided at or in the vicinity of the other end of the body member 2. The arrangement is such that, when the free end of the stem member 4 is located within the locking member 6, interaction between mating components prevents ready separation thereof.

[0046] Referring to FIGS. 2, 3, 3 a and 3 b, a tag 1 has been applied to the skin of an animal as shown in FIG. 3 by initially setting up the tag in a partially “cocked” configuration as shown in FIG. 2 with the stem member 4 located in the opening construction 7 and the implant pin 9 in place above the stem member ready to press down on the stem member. To get to the configuration shown in FIG. 3, the locking member has been bent backwards so that it has been located directly beneath the opening construction 7 and the skin 8 of the an animal has been pinched and folded so that it has been located directly beneath the opening construction 7 and the skin 8 of an animal has been pinched and folded so as to form it into four superimposed layers as is the case when the ear is folded. The implant pin has been pushed down to drive the stem member 4 through the four layers of skin to be received in locking engagement with the locking member 6. The resilient projections 6 a and 6 b bend out of the way as the head is inserted and move back to prevent the head of the stem member 4 being pulled out of the locking member. The natural resilience of the plastics material comprising the tag then urges the tag to unfold to assume the double loop configuration shown in FIG. 3. In this configuration it can be seen that the neck portion 3 of the tag penetrates two superimposed layers of skin, such as may be found on the ear of a cow, at two locations to provide a very secure attachment which is not readily susceptible to accidental removal. Where the attachment is to the ear of an animal it is preferred that the attachment be such that the neck portion 3 becomes secured on the back of the ear, as this has been shown to provide the most likely area where an animal can find purchase by rubbing to remove the tag.

[0047] Thus for example it can be seen that the tag of the invention when it is applied in the manner shown in FIG. 3d through the skin 8 of the ear 12 of a cow, does not provide any purchase for the wires 11 of a fence or equivalent to catch under the tag and force its removal when an animal rubs the back of its ear against the wire. By comparison, a conventional tag 10 as shown in FIG. 3c by having a locking member 13 and by the nature of the one point attachment to the ear, this allows the animal to bring the wire between the ear and the locking member. This can often provide sufficient purchase to allow the animal to remove the conventional tag.

[0048] With reference now to FIGS. 4 to 8, there is shown therein an embodiment of an apparatus for application of a tag in accordance with the present invention. The apparatus includes a main body portion or a barrel 10 substantially cylindrical or parallelapipedal shape when viewed in cross-section. As shown in FIG. 4, the barrel 10 has respective front and rear handle means 11 and 12 extending substantially normally therefrom. The barrel 10 has housed therewithin, for controlled reciprocating movement as and when desired, a driving member 14 and driven member 15 respectively, movable longitudinally within the main body portion 10 between the positions shown in FIGS. 5 and 6. The respective driving and driven members 14 and 15 preferably are in the form of elongate rod-like members or pistons disposed substantially centrally of the barrel 10 and adapted, in use, to be in the driven connection in a manner to be described in more detail hereinafter. The driving form for said reciprocating movement is preferably provided by a compression spring 16 (or the like biassing means) disposed within the barrel 10 and fixedly connected to the driving member 14 in any suitable manner and using any suitable means. However, other means are equally usable, as for example airoperated, hydraulically or pneumatically operated means of any suitable type. In the preferred embodiment shown in FIGS. 4 to 6 one end of the compression spring 16 is attached, as for example by pinning to the driving member 14, with the other end of said compression spring being attached, in any suitable manner, to a priming or cocking mechanism, generally designated 17. The principle of operation is that the cocking mechanism , in the form of a hand grip of a substantially spherical shape, attached to the other end of the driving member 14, when moved in the direction of the arrow, gives rise to compression of the spring 16.

[0049] At the free end of the barrel 10, remote from the cocking means 17, there is attached a further elongate member 20, preferably of substantially semi-cylindrical shape when viewed from the end, such having an elongate slot or channel 21 extending along the length thereof. In use the slot or channel 21 is adapted to receive, and releasably retain for controlled movement therealong, an implant pin 9 of the type illustrated in FIG. 1. At the end of the further member 20 remote from the barrel 10 are located opposed, relatively moveable jaw members 22 and 23, adapted in use to have located therebetween a skin fold of an animal into which a tag in accordance with the present invention is to be located. Preferably one of the jaw members will have an anvil means 25 associated therewith, to assist in disposition of the tag.

[0050] In order to allow for retention of the driving member 14 in the “loaded for discharge” position or configuration as shown in FIG. 5, there is provided a release mechanism, generally designated 30. Such release mechanism is made up of a first elongate member 31, a second elongate member 32 and a cantilever member 33 interconnecting such elongate members 31 and 32. In the embodiment shown in FIG. 4, the cantilever member 33 is pivotally attached to the handle means 12, as for example by pinning it at 34. The opposed ends of the cantilever member 33 may then be preferably fixedly, yet releasably, attached to the respective elongate members 31 and 32. The arrangement is that, when the elongate member 32 is moved in the direction of the arrow (see FIG. 4), such movement gives rise to movement of elongate member 31. In the embodiment illustrated the free end of the elongate member 31 is adapted to, in one location, extend through an aperture or the like disposed at a position removed from the innermost end of the driving member 14. Alternatively, a free end of the elongate member 31 can be adapted to be selectively laterally movable of the barrel 10, into and out of engagement with the innermost end of the driving member 14. Actuation of the release mechanism 30 can be achieved either manually or automatically. When the elongate member 31 is moved out of engagement with the driving member 14, such driving member 15, then functions to drive the associated skin penetrating head of stem member 4 of tag 1 through a skin fold 8 of an animal, to allow for installation thereof.

[0051] The apparatus further includes means, generally designated 40, allowing for selective release and opening of the tag loading section, as by allowing for relative movement between the respective jaw members 22 and 23 thereof.

[0052] Finally, the apparatus includes means, preferably in the form of a trigger means 50, which functions to allow for compression of a skin fold of an animal between the jaw members 22 and 23, ready for installation of a tag in accordance with the present invention.

[0053] With reference now to FIG. 9, a further preferred embodiment of an applicator tool for the implanting of a tag in accordance with the present invention is shown therein, such tool being suited for the installation of such tags in smaller animals, as for example pigs, deer, sheep and other animals. This application is especially suited for installation of a tag in an ear of such an animal. The tool, generally designated 100, includes three principal components 101, 102 and 103 respectively, pivotably connected at 104 in any suitable manner and by any suitable means, as for example by pinning. Members 102 and 103 each have, at or in the vicinity of one free end thereof, an open section 105, such forming therebetween a jaw means or anvil for receiving a pinched skin fold or skin of an animal for implanting therethrough of a tag. The member103 includes an aperture adapted, in use, to receive and releasably retain the locking means 6 of a tag. Preferably members 102 and 103, and also member 101 and 102, can be interconnected by suitable resilient means, as for example a spring or the like 107. In the preferred embodiment illustrated means are provided which allow for relaxation of members 102 and 103 once a tag has been implanted into the skin, thereby to allow for further use of the applicator tool as and when required.

[0054] In operation a fold of skin is located between the members 102 and 103 as shown, with the interposition therebetween and therein of the body portion 2 of a tag in accordance with the invention. The final locking means is located through the aperture of the arm 103, whilst the neck member 3 and associated stem 4 including a head (with or without cutting blade) are adapted to be threaded through an aperture provided in the member 101 and an implanting pin appropriately located on the applicator and, in use, adapted to be placed into, or within, the lumen which constitutes part of the hollow stem. The members 101, 102 and 103 are then actuated in any suitable manner—as for example by hand pressure from the user—to bring such members into substantial juxtaposition, thereby causing the head and associated cutting blade to penetrate the fold of skin and enter into the locking means, to be then affixed therein against unwanted removal. Relaxation of hand pressure then causes the member 101, 102 and 103 to separate—due to spring action—in turn allowing for removal of the skin fold, with tag now implanted therein to produce an assembled tag such as that shown in FIG. 10.

[0055] In FIG. 10 the tag 1 includes the components of a body 2 neck member 3 locking member 6 and opening 7 assembled to form two loops 17 and 18. Loop 17 may be used to hold any form of desired device such as a transponder 16 which may give information concerning the location, identity, physical state or any other aspect of the animal being tagged. Loop 17 may also have attached thereto any other component such as the flag 15 joined via the extension 19. The flag may include information in any form (eg. a barcode), related to aspects of the animal. The extension may be joined by a swivel connection to the first loop 17 of the tag 1. The second loop 18 of the tag 15 is secured to the skin of an animal in the manner illustrated with reference to FIG. 3.

[0056] Alternative forms of tag in accordance with the present invention, are shown in FIGS. 11 and 11b of the drawings. These are also of a unitary construction and again may be formed from any suitable material, such as a plastics material of any given type. The tags generally designated 1, include a body, generally designated 2 having a wider section 2 a, being substantially elongate in shape, having extending from one end thereof a neck member 3 terminating in a stem member 4. The stem member 4 comprises a skin penetrating head attached to a hollow portion 4 a adapted to receive and co-operate with an implant pin of similar type to that described with reference to earlier figures such as FIGS. 1 and 2. At or in the vicinity of the area of transition between the portion 2 a and the neck member 3 there is provided at least one opening, elongate slot, hole or aperture 5 extending through the body portion 2 a. At or in the vicinity of the other, free end of the body portion 2 a there is provided locking means 6 adapted, in use, to co-operate with the neck member 3 and associated stem member 4 whereby to allow for locking of the overall tag in place relative to an animal. The elongate opening, slot, hole or aperture 5 is adapted, in use, to have the free end of the stem member 4 including the head and associated neck member 3 disposed therethrough. The free end of the stem member 4 is adapted in use to be received and releasably retained by the locking means 6. A flag 15 and transponder housing 16 are attached to the body portion 2 a as an integral moulded unit in the case of FIG. 11b and is a separately attachable tag which can be attached by a clip or similar through a hole in the tag body as is shown in FIG. 1a. In the case of FIG. 11c the flag is attached by clip halves 80 and 81 which can be snap fitted around the body 2. FIG. 11d shows how the tag of FIG. 11c would look fitted through the skin 8 of the tail fold of a cow. FIG. 11e shows how the tag of FIG. 11a would look fitted to the ear of a cow.

[0057] Referring to FIGS. 12a to 12 d the stem member generally designated 4 includes a tubular hollow portion 4 a which has an access opening 4 b for receiving the implant pin 9 in the manner shown in FIG. 12d.

[0058] The stem member includes a skin penetrating head 4 c at the end thereof. An arrow shaped metal insert 4 d with sharp edges is retained in the head to facilitate piercing of skin as the head penetrates the skin. The metal insert may be secured in place during the injection moulding process for forming the rest of the parts of the tag. As the rest of the tag may be formed as a single unit in a one shot injection moulding process, the inclusion of the metal insert during the moulding process can result in the insert being accurately held in position by the material of the tag once the molten plastic forming the tag has been allowed to solidify. Typically the arrowhead sides of the insert will extend for a distance of at least 1 mm, the thickness is, preferably no greater than 1 mm and the maximum width across the arrow head is preferably no greater than 10 mm more preferably 8 mm.

[0059] The insert 4 d extends into a cavity 4 e formed in the head 4 c. The cavity is shaped so that the end 9 a of the implant pin locates snugly therein. The end 9 a also includes grooves 9 b which receive the edges of the cut out portion 4 f of the insert and brace them against wobble when the implant presses the head through the skin of an animal to maintain direction for the implant pin and cutting head against the resistance offered by the layers of skin. FIGS. 12e to 12 g show stepwise how the tag is applied.

[0060] Referring to FIGS. 13a to 13 c, the embodiment of a tag 1 shown therein includes two component parts namely a receiving member 1 a and a strap member 1 b which when assembled in the manner illustrated in FIG. 13c combine to form a tag 1 according to the invention with three loops 17, 18 and 20.

[0061] The receiving member is constructed with two locking members 6 provided on both sides thereof. Two openings 7 in the form of slots are arranged so that they are opposed to the locking members. The locking members each include projections 6 a and 6 b to secure the skin penetrating heads 4 c of the strap members in position. A flag 15 and transponder housing or other form of housing 16 a are integrally formed with the receiving member.

[0062] The strap member 16 comprises two joined stem members each provided with heads 4 c. From drawings 13 b and 13 c it can be seen that the skin 8 c of an animal is fitted between the strap member and receiving member which are then pushed together to form the locked configuration shown in FIG. 13c. With the construction shown in FIGS. 13a to 13 c the curvatures of the receiving member 1 a provide tension and the ability to expand or contract. The two slots 7 provide the scope for the movement required for the neck section of the other component of “the tag” in accordance with the growth of the animal.

[0063] The design of this tag is such that the neck sections protrude from the main body of the strap at the extremities or as close as possible to the extremities of the main body. This is so to minimise the risk of inadvertent removal of the strap tag from the rear of the ear, by fencing wire or as in sheep, by shearers hand pieces. As described previously, the stem members can be in the form of shaped extrusions, which each have a blind lumen or bore of variable depth. This allows the implanting pins to be inserted and to direct the penetrating heads through the skin or ear, and into the locking members. The design is not limited to the lumen bore within the neck and head members, nor by the shape of the head members. Underpinning this improvement is the allowance for adjusting the distance between the two piercing parts of the strap at the time of application. For example, when this improved tag is applied to a lamb, the distance between the applicator points as described hereinafter and hence the distance between the two piercing parts of the tag is minimised.

[0064] When applied in such a position, the pierced holes in the skin for example of the ear, now hold and maintain the collars and piercing parts at this set distance. As the pierced holes of the skin grow apart as the animal grows, the collars and the piercing parts then follow this movement, whilst still holding the tag firmly in place. Without this mechanism, a two-point attachment tag would only create larger holes in the skin and ears in young stock. This would not be humane for the animal as well as providing insecurity in the attachment of such a tag. When this improved tag is applied to mature or fully grown stock, the distance between the applicator pins and hence distance between the two piercing parts of the tag is maximised. The applicator apparatus that applies the two component tag of FIGS. 13a to 13 c can be either manual (hand operated) or impact.

[0065]FIGS. 14a and 15 a show two versions of a double headed implant pin 9 a and 9 b used to implant the two headed strap 1 b of “the tag” shown in FIGS. 14b and 15 b. The distance between the drive pins is varied, by means of interchanging the implant pins 9 a and 9 b. The implant pin 9 b is utilized for younger growing stock, whereas the wider unit 9 a is used on the ears of mature stock.

[0066]FIG. 16b shows a double headed strap member 1 b which has been preassembled with a double headed implant pin 9 a. A number of such strap members may be fitted in a cartridge 60 shown in outline in FIG. 16a which can in turn be used to load an automated application apparatus in the form of an impulse gun 61 for assembling tags (see FIG. 16c). The impulse gun is also fitted with a cartridge 62 for holding a number of receiving members 1 a as described with reference to FIGS. 13b, 14 c and 15 c. The cartridges are interchangeable and provide a set distance between the two locking means to match the same distance of the driver head mechanism.

[0067] The mechanical drive function of the impulse gun is similar to the application apparatus previously outlined. Tension provided by compression spring is used to “feed” the tags towards the implanting section of the apparatus. In order to suit the distance between the two pins, at the point of application, the driver head mechanism is interchangeable, to match “the tag” cartridges, where the distances between the penetrating heads and the locking mechanisms are predetermined, to suit the application either to young or mature stock.

[0068] Tag Applicators

[0069] The principle function of the applicator apparatus is to drive the applicator or implant pin, in through the skin including that of the ear, and to lock the head of the strap into the locking mechanism of the tag. The applicator apparatus then holds the implant pin, in order that the implant pin is disposable and designed to be used once, to avoid the potential of spreading infectious agents from animal to animal. In some instances, the implant pin may be used on a repeatable basis. The implant pin can be made of various materials including different grades of steel, plastic and or glass associated products.

[0070] With reference to FIGS. 17 to 21 to 15, there is shown therein a particular embodiment of the apparatus for application of a tag in accordance with the present invention. The apparatus includes two main body portions A & B, when viewed from the side. They are either square, rectangular, cylindrical or parallel pedal shape and are pivoted and joined by rod-like pivot member 20. FIG. 17 shows the position of applicator apparatus, after trigger mechanism 22 has been pressed. Note bodies A & B are now partially separated, but locked by locking member holder 23. The pinched skin or that skin of the folded ear 8, then acts as a holding point, for the implant or applicator pin to be withdrawn from locking member, leaving the head and partial section of collar, captured by locking mechanism and further withdrawal of the applicator pin results in releasing the pin from the guide bush. Once the implant or applicator pin is removed, the skin of the ear resumes its normal position, with tag applied.

[0071] With reference to FIG. 18, there is shown an improved mechanical driving system. The application apparatus improvement is not limited by this, but this is an example of a particular embodiment. There are two coupled sets of linkages 45, 46. The interconnection of the two sets of linkages is attached to the spring driver rod 47. The upper body part 48 of section B provides the support for the collar 49, that forms a stop for compression of the spring or interconnected springs 100. Collar 110 is attached and fixed to spring driver rod in the position shown. The other ends to the coupled linkages 45 and 46 are attached to two thrust support rollers 130. Pin 100 forms an anchor point to linkages 45 and 46 that is also the pivoting point for main body sections A & B. The two thrust support rollers 130 fit neatly within the long internal section of Part A.

[0072] In the activated compression state (FIG. 18), the linkage 46 is cocked or stopped by the trigger mechanism 140 and 150. The trigger mechanism consists of two eccentrically pivoted arms 140 and 150 which interconnect at 160. Depression of trigger 150 results in a forward movement of the elongated member 140, which allows the square edge striker block 160 to be released from the second trigger arm, and activate the compressed spring to expand rapidly against collars 49 and 110, acting on spring driver rod 47, to drive thrust supports roller 130 along channel towards the implant pin 9.

[0073] The drive member 170 moves longitudinally within body section A. The driven member 170 is preferably in the form of elongate rod-like member disposed substantially centrally of the barrel 180 and is the drive connection either directly to the implant pin (as shown) or to another free fall drive unit (not shown), which is not connected to linkage 46 and is designed to provide the drive connection to the implant pin. This free fall adds more momentum to the system to enable skin penetration of the tag.

[0074] The implant pin 29 is struck and drives the tag head 4 c into the locking member 6. The final stroke of the impact driver pin 170 allows the locking mechanism between main body members A & B to be released. The remaining compression of spring 10 forces main body members A & B to spring apart (see FIG. 19). The locking mechanism of the tag is resultantly pulled from the anvil 21, and released from locking member holder 22. The locking member holder 22, is pivoted from main body A at 23 and forms an L shape. At the bottom of the L shape, two fork like features protrude to capture the sides of the locking member of “the tag”. A shouldered flat section 24 protrudes from the main body of the locking member holder. This shoulder interconnects with a flat long trigger, spring 25, 26 as shown.

[0075] The functions of the locking bush holder are:

[0076] 1. To hold the locking bush of the tag in position for application

[0077] 2. The locking bush holder is locked with locking mechanism 25, 26, after the applicator tool has been fired to release the locking member in order for the implant pin to be released from its fired position. Now referring to FIG. 18 & FIG. 20 a round flat washer 210 is fixed to the end of spring driver rod 47. This distance along this rod 47 determines the distance of anvil release (ie. how far apart main body A & B are sprung apart). Once released, manual withdrawal of implant pin occurs using the pin attachment within the cylindrical tube with driver rod positioned on head of implant pin. This pin withdrawal is not limited to only this process. By way of another example, facilities for the coupled linkages, when fixed, could be made so that the linkages could push past their fully extended and vertical plane, which would allow the applicator pin to be subsequently lifted, given a claw like attachment when positioned under the base of the applicator head pin (not shown).

[0078]FIG. 21 refers to a preferred embodiment of the applicator apparatus, in preparation and actual lodging of “the tag”. The action of mechanically widening the gap between the main body sections A & B results in several functions.

[0079] The driver pin 170 is pulled back up the cylindrical structure 180.

[0080] The coupled linkages 45, 46 are in their angular orientation (not limited by angle of presentation shown).

[0081] The trigger mechanism 140 and 150 is reset and is locked onto the striker block.

[0082] The stop 21 and re-set trigger 14, 15 locks the angular orientation of the two main body components. The position of stop 21 along the spring driver rod determines the angle main bodies A & B are orientated. This determines the opening angle, and allows positioning of the locking member alignment guide 23 to locate the locking member, to enable the tag to maintain its curvature between the guide 27 and locking member 6, for tag application.

[0083] The locking member alignment guide allows the safe locking of “the tag” in an aligned position. The above features now ensure “the tag” is loaded whilst there is no tension of the main spring. This is an important safety feature.

[0084] Locking of the application apparatus is achieved once the tag is mounted, by pushing main body sections A & B together. Once drawn together, the locking mechanism to hold the sections together is activated. Referring to FIG. 18, a wide section with a slightly curved base section 24,. attached to main body section A, presses over a long but narrow plate 25, which has a compression spring 26 exerting a positive force, through a thin plate 27. There is a gap between Main Body A and curved section 240, which allows a stop point, created by the plate being pushed into the position via the spring 26. Once engaged, the two main body sections are locked together. The striker 160 releases this locking mechanism at the end of the stroke, by pushing the plate 25 downwards, to release the section 240.

[0085] General Discussion

[0086] The arrangement in accordance with the present invention has been found to be responsible for a number of important practical advantages, especially when compared with the more conventional animal ear tags as now in use. The advantages associated with the present applicant's arrangement are explained hereinafter in more detail.

[0087] Firstly, and by virtue of its actual configuration and location on the animal, the present applicant's tag can afford significantly enhanced readability. In that regard ear tags in accordance with the known art presented limited readability, as for example from the rear of the animal, in a milking shed or place when an animal—such as a cow—is being milked from the side and towards the rear, in laneways, etc. Alternatively, and as is sometimes the case in accordance with the known art when a leg tag is employed, such also affords only limited readability, dependent upon the location of viewing, and especially if covered over or soiled by dirt, faeces, etc.

[0088] Perhaps even more importantly the tag is accordance with the present invention, by reason of its very configuration and location on the animal, is improved security against accidental damage or removal. This in marked contrast to the situation with conventional ear tags and other types of tags as are currently in use, which can exhibit a loss rate in excess of 4%, a significant number in real terms, and in fact an unacceptable number for practical purposes.

[0089] Thirdly, and by reason of the fact that a tag in accordance with the present invention is designed specifically to be attached at two points within an area of skin, it exhibits much stronger attachment to the animal, again resulting in a minimising of the likelihood of unwanted removal, as could and did happen with the prior art arrangements, for example by rubbing against other surfaces. Further, it must be realised that the single point of attachment evident with conventional ear tags can give rise, with time, to enlarging of the hole to such an extent as to perhaps allow for the overall tag to slid therethrough, resulting in loss of the tag and leaving the animal not as readily identifiable. This possibility is effectively reduced with the tag in accordance with the present invention.

[0090] The tag in accordance with the present invention is of especial significance as it provides a means to readily attach other labelling means or markers, providing a means for quality assurance application that can be readily utilised by farmers and/or operators in sale yards and abattoirs. By way of example a cow with a mastitis infection is treated with antibiotics. The cow is normally kept in the herd but she needs to be identified when presented for milking. Her milk is withheld from the main collection area as it contains antibiotics and a special collection bucket or the like is used to collect her milk. In accordance with the prior art practices, one method of distinguishing an infected cow from others was to actually paint the cow, whereby to allow ready identification thereof. The problem was, however, that when the cow was cleared of infection, more often than not the paint was still visible, being difficult to remove therefrom readily. The present applicant's arrangement provides a solution to such a problem by including a facility which allows for location on the tag of a suitable further label or distinguishing means, as for example a coloured marker, which may be readily removed or replaced to suit changing circumstances.

[0091] Further to the above, a major advantage of the present applicant's arrangement, for location within an area of skin of an animal, is the facility for many other management systems and/or marking identification devices to be used in conjunction therewith.

[0092] It should be realised that a tag in accordance with the present invention can vary considerably, from its front-on look or view, as shown in FIG. 1, to its in situ appearance as shown in other drawings.

[0093] Such a tag can self-adjust according to the anatomy of the animal involved, initially at the time of actual installation of the tag, and thereafter, according to changes in the physiology of the animal during its lifetime. Indeed, a tag in accordance with the present invention is a multi-purpose article, which may be designed to allow for changes or variations in:

[0094] i) skin thickness of the animal at the time of actual application;

[0095] ii) body condition of the animal, as for example changes in fat content or thickness in the subcutaneous tissue; and

[0096] iii) growth of the animal with time, thus being especially insignificant when a tag is desired to be installed in or on an immature animal.

[0097] A tag in accordance with the invention can remain in place on the animal for the lifetime of that animal. However, by allowing for ready attachment thereto of additional tags, identification means or the like, the tag in accord with the invention serves other important functions, without necessitating removal, according to the desires of the owner of the tagged animal. For example if ownership changes, as can often happen, a different identification means can be readily located on the tag. By reason of the preferred location of the tag in accordance with the present invention, at or in the area of the tail fold, the additional of further, or amended or changed, identification information, means or the like can be done simply and easily, even within the limited confines of a cattle race or milking shed. This is in marked contrast to what could be achieved with the prior art ear tags, wherein it was necessary to in effect head-lock the animal to gain access to the ear and associated tag.

[0098] Turning again to the drawings it should be noted that, in use, the body portion of the tag is intended to be aligned substantially parallel to the skin fold of the animal. The implanting portion or penetrating head of the tag is placed centrally through the further aperture, and then has two points of attachment to the skin, thereafter again coming into contact with the body portion for engagement with the locking means thereof. By reason of such a configuration and mode of application, the tag when installed is located relative to the surface of the skin of the animal in an extremely stable manner. The thus installed tag will therefore be substantially proofed against unwanted movement relative to the animal, as for example rotation, being movement of a type which was all too readily possibly with the prior art tags. In fact, the operator/installer may have total control over how a tag in accordance with the present invention is disposed on a given animal.

[0099] In the result, a loop formed by the tag located external to the skin or skin fold allows for ready and continuous variation in the location relative thereto for additional marking or information devices. Such caters for variations which could possibly exist—from one animal to the next—in the angle or inclination of the skin into which the tag is to be inserted or implanted. By way of example only, the angular variation of the skin may be as much as 90° in the vertical plane. With the present tag, the operator/implanter can select the angle of attachment relative to the area of pinched skin, hence maintaining the tag in its optimum position on the animal in terms of readability, access, etc., effectively independent of the animal's anatomy.

[0100] In accordance with the known art electronic marking or identification means have been employed, for location on or in an animal of any given type. In actual fact at least three electronic identification systems presently exist. These include a microchip placed in an ear tag, a microchip placed in the stomach or rumen of the animal and/or a microchip placed on a necklace or the like, to be located around the neck or throat of the animal. Each of these, however, has been found to suffer from a number of disadvantages. Firstly animals must pass through a reading station individually and at a limited speed. Secondly the reading station or scanner must be able to cover a wide area, by reason of the fact that the head and neck of the animal should be in different positions as different animals pass through the scanner. When one bears in mind that there may be a tendency for more than one animal to enter a shed or the like at substantially the same time, there is a likelihood of inaccuracies in reading when electronic means of identification are employed. The present applicant's arrangement, however, especially when located in a tail fold position, ameliorates the aforementioned disadvantages, principally by reason of the fact that, from animal to animal, the tag in accordance with the present invention can be located at substantially the same height and position, not only facilitating reading but also eliminating any problems which would have been caused previously be having more than one animal enter the scanning area at the same time, since the scanning equipment can be more accurately directed when compared with the prior art arrangements.

[0101] In a situation wherein a microchip was located within the rumen of an animal, such also gave rise to problems in terms of retention rate and actual readability. These problems are to all intents and purposes ameliorated when a tag in accordance with the present invention is positioned on the tail-fold of the animal. In actual fact with the present application's arrangement the process of electronic identification or monitoring of animals can become more simple and significantly more reliable.

[0102] In terms of actual visual identification applicant's arrangement, as distinct from electronic identification, can be responsible for significant advantages. In that regard it should be realised that most procedures carried out on animals, as for example milking with cows, artificial insemination, pregnancy testing and often therapeutic treatment, are conducted from the rear of that animal. It therefore makes sense to utilise means which allow for ready identification of the animal from the rear, rather than to have to look elsewhere on the body of that animal.

[0103] A further advantage associated with the present applicant's arrangement results from a tag in accordance with the present invention having the facility to have associated therewith and attached thereto other devices, as for example a pressure sensitive device of any given type. When the animal involved is a cow, for example, the incorporation of such a pressure-sensitive device on the tag located within the tail-fold area will indicate when the cow has been served or mounted, hence affording an indication as to whether or not a cow is in season and/or is ovulating. Such constitutes an extremely important facility and associated advantage for purposes of herd management. In that regard it should be realised that many cattle in Australia are artificially inseminated. It therefore becomes imperative for the farmer/herd owner to be able to determine readily when a cow is in season.

[0104] It is to be understood that the word comprising as used throughout the specification is to be interpreted in its inclusive form ie. use of the word comprising does not exclude the addition of other elements.

[0105] Finally it should be understood that the aforegoing description refers merely to be preferred embodiments of the present invention and that variations and modifications will be possible thereto without departing from the spirit and scope of the invention. 

1. A tag for attachment to an animal skin comprising, a body portion, a skin penetrating head attached to the body portion, at least one opening in the body portion, and a locking member attached to the body portion at a different location to the skin penetrating head, the locking member being engageable with the skin penetrating head to secure the two from being pulled apart, wherein the construction is such that the skin penetrating head and a section of the body portion may be threaded through an opening to bring the skin penetrating head into engagement with the locking member to arrange the tag in a configuration of at least two loops, the opening serving to hold the tag in the at least two loop configuration.
 2. A tag according to claim 1 wherein the locking member and body portion are moulded as an integral unit from resilient plastics material which acts to maintain the at least two loops under tension, whereby the section of body portion extending between the opening and piercing head may increase by virtue of movement of an increasing section of the body portion through the opening to accommodate growth of the animal.
 3. A tag, according to claim 1 which is formable into a configuration of three loops wherein the body portion comprises, a receiving member having two locking members spaced apart by an intermediate section, a separate flexible strap member having two skin penetrating heads spaced apart by a central section of the strap member, and at least one opening provided in the intermediate section, the at least one opening being constructed so as to allow each skin penetrating head to be threaded through the at least one opening to be engaged by a respective one of the two locking members.
 4. A tag according to claim 3 wherein the at least one opening comprises an elongate slot or two separate openings.
 5. A skin penetrating head comprising a central supporting portion of moulded plastics material having at least two thin flanges extending beyond the central supporting portion the at least two thin flanges having sharp edges and meeting at a sharp point forward of the supporting portion, the sharp edges of the at least two flanges each extending for a distance of at least 1 mm and having a width of at least 1 mm past the edge of the central supporting portion and a maximum thickness of 1 mm, the maximum width of the skin penetrating head being no greater than 8 mm.
 6. A skin penetrating head according to claim 5 wherein the flanges comprise a single piece of metal generally in the form of an arrowhead extending through and from both sides of the central supporting portion, the central portion of the metal arrowhead extending into an open ended recess formed in the central supporting portion whereby to permit access to the central portion of the metal arrowhead by an implant pin for pushing the skin penetrating head through animal skin.
 7. A skin penetrating head according to claim 5 which is designed to cut through the skin along the sharp edges of the flanges.
 8. A tag according to claim 1 including a skin penetrating head in accordance with claim 5 which is designed to cut through the skin along the sharp edges of the thin flanges.
 9. An animal tag including a skin penetrating head in accordance with claim
 6. 10. A method of applying a tag according to claim 1 to the skin of an animal which comprises, setting the configuration of the tag so that the skin penetrating head and the locking member are on opposite sides of the skin being tagged which skin is folded to form at least two superimposed layers, pressing the skin penetrating head through the superimposed layers and into engagement with the locking member to form a closed tag in a configuration of at least two loops.
 11. A method according to claim 10 wherein the skin is folded to form four superimposed layers.
 12. A method according to claim 11 wherein the skin comprises skin from the ear of an animal.
 13. A tag according to claim 1 having attached thereto any one or more of a flag, a flag attached by a swivel, any form of data concerning the animal to which the tag is attached, a transponder, any form of diagnostic or electronic device, any form of treatment device or chemical, any form of signalling device, and any form of locating device.
 14. A tag according to claim 1 which has been applied to the lateral tail fold of a cow or bull.
 15. A tag according to claim 1 including a thermoprobe and/or any other data collecting or therapeutic chemical or device located on a portion of the tag which is subcutaneously placed in use.
 16. An applicator for an animal tag having a skin penetrating head engageable with a locling member comprising, first and second body portions pivotably joined together and pivotable towards and away from each other so as to move between first and second pivot configurations, driver head means engageable with the skin penetrating head and movable along the first body portion between a first position in which the skin penetrating head is held spaced by a gap from the locking member and a second position in which the skin penetrating head has been pushed into locking engagement with the locking member, an anvil for abutting the locking member, drive means for driving the driver head means from the first position to the second position the drive means being energisable by pivoting the first and second body portions from the second pivot configuration to the first pivot configuration, locking means for locking the driver head means in the first position, and a trigger to release the locking means whereby to cause the driver head means to push the skin penetrating head through animal skin held in the gap and into locking engagement with the locking member.
 17. An applicator according to claim 16 wherein the anvil is mounted on the second body portion and the driver head means comprises a driver head longitudinally slidable within the first body portion.
 18. An applicator according to claim 16 wherein the driver head means comprises, a driver head slidable within the first body portion and engageable with the skin penetrating head, and the drive means comprises a spring actuated linkage arranged so that the spring is put under compression when the first and second body portions are pivoted towards each other to assume the first pivot configuration and the spring actuated linkage is arranged to transmit force from the compressed spring to push the driver head.
 19. An applicator according to claim 18 wherein the driver head comprises an implant pin engageable with the skin penetrating head and a rod member, one portion of the rod member being in driving engagement with the implant pin and another portion of the rod member connecting to the spring actuated linkage.
 20. An application according to claim 19 wherein the rod member and implant pin are two separate components, one end of the rod member abutting an end of the implant pin.
 21. An applicator according to claim 18 wherein the spring actuated linkage comprises, first and second elongate linkage members pivotally joined to each other at a first linkage point, a spring driver rod pivotally connected to the first and second elongate linkage members at the first linkage point, a spring arranged to urge the spring driver rod to exert force through the first linkage point, a second linkage point for pivotally connecting the first elongate linkage member to the first body portion, and a third linkage point for pivotally connecting the second elongate linkage member to the rod member.
 22. An applicator according to claim 21 comprising, a thrust support roller attached to the third linkage point, and a channel in the first body portion, wherein the channel is arranged to guide the thrust support roller as the implant pin is driven by the driver head.
 23. An applicator according to claim 21 wherein the third linkage point also forms the pivotal join between the first and second body portions and the spring driver rod and spring are housed in a lateral extension of the second body portion.
 24. An applicator for an animal tag having a pair of skin penetrating heads comprising a first component of the tag, the skin penetrating heads being engageable with one of a pair of corresponding locking members comprising a second component of the tag applicator comprising, driver head means engageable with both skin penetrating heads and movable between a first position in which the skin penetrating heads are spaced by a gap from the locking members and a second position in which each skin penetrating head has been pushed into locking engagement with the corresponding locking member, drive means for driving the driver head means from the first position to the second position, a trigger for actuating the driver head means to push both skin penetrating heads through animal skin held in the gap and into locking engagement with the corresponding locking member.
 25. An applicator according to claim 24 wherein the applicator comprises, first and second body portions pivotably joined together and pivotable towards and away from each other so as to move between first and second pivot configurations, and locking means for locking the driver head means in the first position, wherein the trigger is arranged to release the locking means whereby to cause the driver head means to push both skin penetrating heads through animal skin held in the gap and into locking engagement with the corresponding locking members, and the drive means are energisable by pivoting first and second body portions from the second pivot configuration to the first pivot configuration.
 26. An applicator according to claim 25 wherein the anvil is mounted on the second body portion and the driver head means comprises a driver head longitudinally slidable within the first body portion.
 27. An applicator according to claim 25 wherein the driver head means comprises, a driver head slidable within the first body portion and engageable with the skin penetrating heads and the drive means comprises a spring actuated linkage arranged so that the spring is put under compression when the first and second body portions are pivoted towards each other to assume the first pivot configuration and the spring actuated linkage is arranged to transmit force from the compressed spring to push the driver head.
 28. An applicator according to claim 27 wherein the driver head comprises a pair of implant pins engageable with the pair of skin penetrating heads and a rod member, one portion of the rod member being in driving engagement with the implant pins and another portion of the rod member connecting to the spring actuated linkage.
 29. An application according to claim 27 wherein the rod member and pair of implant pins are two separate components, one end of the rod member abutting an end of the pair of implant pins.
 30. An applicator according to claim 27 wherein the spring actuated linkage comprises, first and second elongate linkage members pivotally joined to each other at a first linkage point, a spring driver rod pivotally connected to the first and second elongate linkage members at the first linkage point, a spring arranged to urge the spring driver rod to exert force through the first linkage point, a second linkage point for pivotally connecting the first elongate linkage member to the first body portion, and a third linkage point for pivotally connecting the second elongate linkage member to the rod member.
 31. An applicator according to claim 30 comprising, a thrust support roller attached to the third linkage point, and a channel in the first body portion, wherein the channel is arranged to guide the thrust support roller as the pair of implant pins is driven by the driver head.
 32. An applicator according to claim 30 wherein the third linkage point also forms the pivotal join between the first and second body portions and the spring driver rod and spring are housed in a lateral extension of the second body portion.
 33. An applicator for an animal tag having a skin penetrating head engageable with a locking member comprising, driver head means engageable with the skin penetrating head and movable between a first position in which the skin penetrating head is held spaced by a gap from the locking member and a second position in which the skin penetrating head has been pushed into locking engagement with the locking member, an anvil for abutting the locking member, a cartridge for holding a plurality of locking members and for serially bringing the locking members into abutting registry with the anvil after each application of one of the animal tags to an animal, drive means for driving the driver head means from the first position to the second position, locking means for locking the driver head means in the first position, and a trigger to release the locking means whereby to cause the driver head means to push the skin penetrating head through animal skin held in the gap and into locking engagement with the locking member.
 34. An applicator for an animal tag according to claim 33 wherein the animal tag comprises a pair of skin penetrating heads joined together as a first component of the animal tag and a pair of corresponding locking members joined together as a second component of the animal tag and the applicator comprises, a penetrating head cartridge for holding a plurality of paired skin penetrating heads and for serially bringing the paired skin penetrating heads into engaging registry with the driver head means after each application of one of the animal tags to the animal, driver head means engageable with both skin penetrating heads and movable between a first position in which the skin penetrating heads are spaced by a gap from the locking members and a second position in which each skin penetrating head has been pushed into locking engagement with the corresponding locking member, drive means for driving the driver head means from the first position to the second position, and a trigger for actuating the driver head means to push both skin penetrating heads through animal skin held in the gap and into locking engagement with the corresponding locking member.
 35. An applicator according to claim 34 comprising first and second body portions pivotably joined together and pivotable towards and away from each other so as to move between first and second pivot configurations, and locking means for locking the driver head means in the first position, wherein the trigger is arranged to release the locking means whereby to cause the driver head means to push the pair of skin penetrating heads through animal skin held in the gap and into locking engagement with the corresponding locking members, and the drive means are energisable by pivoting the first and second body portions from the second pivot configuration to the first pivot configuration.
 36. An applicator according to claim 34 wherein the anvil is mounted on the second body portion and the driver head means comprises a driver head longitudinally slidable within the first body portion
 37. An applicator according to claim 34 wherein the driver head means comprises, a driver head slidable within the first body portion and engageable with the skin penetrating head, and the drive means comprises a spring actuated linkage arranged so that the spring is put under compression when the first and second body portions are pivoted towards each other to assume the first pivot configuration and the spring actuated linkage is arranged to transmit force from the compressed spring to push the driver head.
 38. An applicator according to claim 37 wherein the driver head comprises a pair of implant pins engageable with the pair of skin penetrating heads and a rod member, one portion of the rod member being in driving engagement with the implant pins and another portion of the rod member connecting to the spring actuated linkage.
 39. An application according to claim 37 wherein the rod member and pair of implant pins are two separate components, one end of the rod member abutting an end of the pair of implant pins.
 40. An applicator according to claim 37 wherein the spring actuated linkage comprises, first and second elongate linkage members pivotally joined to each other at a first linkage point, a spring driver rod pivotally connected to the first and second elongate linkage members, at the first linkage point, a spring arranged to urge the spring driver rod to exert force through the first linkage point, a second linkage point for pivotally connecting the first elongate linkage member to the first body portion, and a third linkage point for pivotally connecting the second linkage member to the rod member.
 41. An applicator according to claim 40 comprising, a thrust support roller attached to the third linkage point, and a channel in the first body portion, wherein the channel is arranged to guide the thrust support roller as the pair of implant pins are driven by the driver head.
 42. An applicator according to claim 40 wherein the third linkage point also forms the pivotal join between the first and second body portions and the spring driver rod and the spring are housed in a lateral extension of the second body portion. 